Spin-dependent scattering in multilayered magnetic rings -: art. no. 137201

被引：65
|
作者：
Castaño, FJ [1 ]
Morecroft, D [1 ]
Jung, W [1 ]
Ross, CA [1 ]
机构：
[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
来源：
PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 13期
关键词：
D O I：
10.1103/PhysRevLett.95.137201
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Narrow mesoscopic NiFe/Cu/Co elliptical rings exhibit room-temperature giant magnetoresistance with distinct resistance levels corresponding to three different micromagnetic states. The highest and lowest resistance states of the multilayer rings correspond to the Co layer being in a bidomain state, antiparallel or parallel, respectively, to the NiFe, while the intermediate resistance corresponds to the Co layer being in a vortex state. Micromagnetic simulations suggest that the behavior of these rings is dominated by magnetostatic interactions between the domain walls in the Co and NiFe layers. Additional magnetization states in the NiFe at low applied fields can account for the minor loop behavior.
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页数：4
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